Base64 Encoder & Decoder

A developer-first, privacy-focused Base64 tool that auto-detects whether to encode or decode. Paste any text or Base64 string, and it instantly shows the result — no buttons required.

Image to Base64 (Data URIs)

Drag and drop any image (PNG, JPG, SVG, WebP) directly onto the page. We will instantly render it as a local preview and generate the exact CSS Background Image and HTML Image Tag snippets you need, ready to copy. Stop guessing if your Data URI works.

URL-Safe Handling & JWTs

Working with URL parameters or JSON Web Tokens (JWTs)? Toggle the URL Safe mode to automatically replace + with - and / with _, exactly as required by the RFC 4648 standard.

100% Secure & Client-Side

Your data never leaves your device. All encoding, decoding, and file processing happens locally in your browser using secure native Web APIs (btoa, atob, and FileReader). We don't use servers to process your strings or images.